Roll and calender

Abstract

Roll that includes a roll axle, a roll jacket, and a bearing ring positioned to rotatably support the roll jacket, and calender that includes the roll. The bearing ring is non-rotatable but is radially movable relative to the roll axle. A locking device is positionably adjustable to selectively block and unblock a radial lift movement, and the locking device includes a rotatable part having a longitudinal opening. The rotatable part is rotatable into a first rotational position in which the longitudinal opening is oriented substantially parallel to a direction of the radial lift movement, and is rotatable into a second rotational position in which the radial lift movement is blocked. The calender further includes a neighboring roll arranged to form a nip with the roll, and at least one further roll. The neighboring roll and the further rolls are mounted for displacement in the pressing direction, and a device arranged to selectively block and unblock the displacement of the neighboring roll.

What is claimed:  
     
       1. A roll comprising: 
       a roll axle;  
       a roll jacket;  
       a bearing ring positioned to rotatably support said roll jacket, said bearing ring not rotating with said roll jacket but being radially movable relative to said roll axle;  
       a locking device positionably adjustable to selectively block and unblock a radial lift movement, said locking device comprising a rotatable part having a longitudinal opening; and  
       said rotatable part being rotatable into a first rotational position in which said longitudinal opening is oriented substantially parallel to a direction of said radial lift movement, and being rotatable into a second rotational position in which said radial lift movement is blocked.  
     
     
       2. The roll in accordance to  claim 1 , wherein said rotatable part either is formed by said bearing ring or is movable with said bearing ring. 
     
     
       3. The roll in accordance to  claim 1 , wherein said rotatable part is positioned to rotate around a rotational axis of said roll jacket. 
     
     
       4. The roll in accordance to  claim 1 , wherein said longitudinal opening comprises longitudinal edges having concave sections with a bending radius that correspond to said roll axle in this region, and 
       said roll axle comprising flattened sections in a region of said rotatable part which extend substantially parallel to the direction of radial lift movement.  
     
     
       5. The roll in accordance to  claim 4 , wherein the distance between said flattened sections is as large as an opening width of said longitudinal opening. 
     
     
       6. The roll in accordance to  claim 4 , wherein slides are arranged to lie on said flattened sections, and each of said slides have a flat lower side arranged adjacent said flattened sections and an upper side having a bending radius over at least a part of its axial length that is the same as the bending radius of the axle in the region of said rotatable part. 
     
     
       7. The roll in accordance to  claim 6 , wherein said slides have a radially protruding projection having at least one support surface that cooperates in an axial direction with a corresponding opposing surface on said rotatable part. 
     
     
       8. The roll in accordance to  claim 7 , wherein said projection is structured to fit into an inner groove on said rotatable part. 
     
     
       9. The roll in accordance to  claim 7 , wherein said rotatable part is supported on a radially outer side of said projections. 
     
     
       10. The roll in accordance to  claim 1 , wherein said roll comprises a sag compensation roll. 
     
     
       11. The roll in accordance to  claim 1 , wherein said axle has a decreased diameter in the region of said rotatable part. 
     
     
       12. A process of operating a roll that includes a roll axle, a roll jacket, bearing ring positioned to rotatably support the roll jacket, to not rotate with the roll jacket and to be radially movable relative to the roll axle, and a locking device, which is positionably adjustable to selectively block and unblock a radial lift movement, wherein the locking device includes a rotatable part having a longitudinal opening, said process comprising: 
       one of:  
       (a) rotating the rotatable part into a first rotational position in which the longitudinal opening is oriented substantially parallel to a direction of the radial lift movement, and  
       (b) rotating the rotatable part into a second rotational position in which the radial lift movement is blocked.  
     
     
       13. The process in accordance with  claim 12 , wherein in the first rotational position, the roll is operable as a lift jacket roll. 
     
     
       14. The process in accordance with  claim 12 , wherein in the second rotational position, the roll is operable as a stationary roll. 
     
     
       15. A process of operating a roll that includes a roll axle, a roll jacket, bearing ring positioned to rotatably support the roll jacket, to not rotate with the roll jacket and to be radially movable relative to the roll axle, and a locking device, which is positionably adjustable to selectively block and unblock a radial lift movement, wherein the locking device includes a rotatable part having a longitudinal opening, said process comprising: 
       at least one of:  
       (a) rotating the rotatable part into a first rotational position in which the longitudinal opening is oriented substantially parallel to a direction of the radial lift movement, and  
       (b) rotating the rotatable part into a second rotational position in which the radial lift movement is blocked.